Maximum-speed control for motor vehicles



C. E. WISHERD MAXIMUM SPEED CONTROL FOR MOTOR VEHICLES Filed April 30. 1923 2 Sheets-Sheet 1 INVENTOR (2/4/15? @MifiWf/ffi BY I 6 ATTORNEY.

C. E. WISHERD MAXIMUM SPEED CONTROL FOR MOTOR VEHICLES Filed April 30-. 1923 2 Sheets-Sheet z y, w a y Z 7 M 4 3 w 2 duh/IR z wii A TTORNEY.

' Patented Feb. 17, 1925.

UNITED STATES PATENT OFFICE.

maxmuu srnnn CONTROL FOR MOTOR VEHICLES.

Application filed April so, 1923. Serial No. 635,719.

To all whom it may concern:

Be it known that 1, CHARLES EDWARD Wrsnnnn, a citizen of the United States of not limit the pulling speed control which can .-be quickl America, residin at Denver, in the county of Denver and vented certain new and useful Improve ments in Maximum-Speed Controls for M0 tor Vehicles, of which the .following 1s a' specification.

This invention relatesto means whereby the speed of a motor vehicle can be limited to a certain predetermined maximum and has for its principal object the provision of a device of this character in.which the speed of the engine can be increased when the transmission is in low gear. v

A further, object. of the device is to provide a device of this character which will wer of the machine when the car is trave ing below the maximum spec g r A still further object is to provide at an easily installed upon present types 0 automobiles without the necessity of changing.

the present construction. 7

' Other objects and advantages reside in the detailed construction of the invention,

Y which result in simplicity, economy and efficiency, and which will become more apparent mm the following description.

In the following detailed description of the invention reference is bad to the accompanying drawing which forms a part hereof.

ike numerals referto like parts in all views of the drawing and throughout the In the drawing Fig. 1 is a cross sectional view of the connecting flanges between the carburetor and the intake manifold of an internal combustion engine, showing the invention in place.

In this view, the device is in the positlon it maintains while the automobile is'traveling i the line 3-3 Fig. 1.

Fig. 4 is a perspective view showing the method of connecting the invention with the low ear pedal of certain automobiles, where y speeding .of the engine is allowed in low gear. In this view only the necessa parts of the automobile are shown.

S tate of Colorado, have in-" past-maximum Fig. 5 is a cross sectional view of the invention employing an alternate form of valve.

Fig. 6 is a similar view showing the valve in the closed position.

Fig. 7 is a cross sectional viewof still another method of forming the valve.

Let the numeral 10 designate an intake manifold of an internal combustion engine and the numeral 11 the carburetor outlet. Manifold 10 and carburetomoutlet 11 are usually connected by means of coacting flanges 12, secured. thereon. The invention is attached between these flanges 12 and consists of a relatively thick gasket 13 carrying a cylindrical projection 14 equal in diameter to the internal diameter of the intake manifold.

Projection 14 is closed at its extremity by a circular plate 15. Plate 15 contains a large concentric opening 16 surrounded by a semes of smaller 0 nings 17.

Hinged to the p ate 15 as shown at 18 is a circular flap or valve 19 which is adapted to close the opening 16. Valve 19 is provided with an angularly disposed arm 20,

the valve 19 in the open position as shown.

\ in Fig. 1.

The intake in their flow from the carburetor to t e intake manifold constantly exert pressure against the valve 19 and when the velocity of the gases has reached a certain int, they will force the valve 19 to the close position shown in Fig. 2, against the compression of the spring The compression of the spring 24 can be so adjusted, by means of the nut 25, that the valve 19 Wlll close at any predetermined speed of the engine. In order to allow the engine to be speeded above this point for low gear work, a bell crank lever 26 is secured to the cylinder block, one extremity of which surrounds the rod '21 above the spring 24, the other extremity being connected, by means of a rod 27, to a similar horizontal bell crank lever 28, secured on the opposite side of theengine block, which in turn connects to the and levers above described will act to com press the spring 24 thereby requiring a reater velocity of gas in the intake maniion a; close the valve 19. This allows the engine to be speeded to a much higher degree when the automobile is required to do hard pulling in low gear.

The clamp 31 is threaded on the rod and can be adjusted thereon and locked at any desired position by means of a lock nut 32, so that the maximum degree of speed allowed in'low gear can be adjusted as desired. The rod 27 passes to the opposite and third cylinders.

As illustrated and described, the invention has been applied to automobiles having planetary transmissions. It is, however,.

equally applicable to automobiles having the selective sliding gear transmissions in which case the series of rods and levers are connectedto the gear shift lever of the automobile where similar results can be obtained.

Nut 25 and rod 21-. can be drilled to receive a seal 33 to prevent the adjustment of the device from being changed after it has once been set. If desired, a cover could be provided to cover the projecting portion of the rod 21 and this cover locked in place to prevent tampering. I

After the engine has passedthe maximum set speed and the valve 19 has closed, gas will still flow to the engine through the smaller openings 17 to prevent it stopping and stalling the automobile.

It will be noted that the opening 22 is en-- larged towards its interior end to allow for the swing of the rod 21 upon the arm 20.

On certain types of automobile engines there is a cap screw 34, in the engine block which can be utilized to secure the bell crank lever 26.- Bell: crank-lever 28 is secured by a bolt used on certain automobiles to hold the cylinder block to the crank case. It is therefore, unnecessary to drill or tap new openings for this device or change the present construction in any way.

If desirable the valve 19 and the opening 16 may be ma e lar er and the smaller openings 17 laced in the valve 19, as shown in Fig. 7. is form has been found desirable in certain types of automobiles where the restriction of the manifold opening in the former described type interferes with the action of the engine, as with its use, the opening is but slightly restricted. In Figs. 5 and (ithe invention is illustrated with an alternate form of valve designated by the numeral 35. This valve consists of acylinder having a closed end 36 and provided with openings 37 ad'acent said closed end. Cylinder 35 is slidab y mounted in a cylindrical seat 38 carried by the gasket 13. A small bell crank lever 39 is pivoted, as shown at 40, and connects at one extremity with the rod 21 and at the other extremity with the valve cylinder 35.

The pressure of the moving gas a ainst the closed end 36 tends to force the cy inder 35 in its seat 38, thereby closing the openings 37 as shown in Fig. 6, and shutting down the supply of gas to the engine.

Auxiliary openings 41 are provided either as shown in the drawings or in the closed end to prevent stopping of the engine when the valve 35 closes. side of the en 'ne through the opening 1n, the cylinder b ock, 34, between the second While the specific form of the improvement has been described and illustrated herein, it is desired and understood that the same may be varied, within the scope of the appended claims, without departing from the spirit of the invention.

Having thus described the invention, what is claimed and desired secured by Letters Patent is 1. A speed control for motor vehicles comprising a gasket arranged for placing between the carburetor and intake manifold of the engine of said vehicle; a valve seat arranged on said gasket; a valve acting on said seat to control the volume of the intake gases; a rod operatively connected with said valve and passing to the exterior of saidgasket; a spring arranged on said rod for holdin said valve in the open position; a

, held in a ball. seat in said gasket to prevent leakage around 'said rod.

'2. The combination with a speed control for motor vehicles comprising a valve controlling the gas supply to the engine of said vehicle, said valve being located in the intake manifold of said engine and actuated by the pressure of the inboimd gases; a spring arranged to hold said valve in the open position; of means acting on said spring and connected to the gear shift lever of said vehicle so as to cause said spring to olfer greater resistance to the closing of said valve when the vehicle is operating in low gear.

3. A speed control for motor vehicles com-.

valve; a rod ivoted to said arm and extending radi 1y to the exterior through said gasket; a s ring arranged on said rod for holding sai valve in the open position and means for adjusting the action of said said manifold and provided with an opening; a flap hinged within said gasket and arranged to close said opening; an arm secured to said flap; a threaded rod secured to said arm and projecting through the edge of said asket and a spring compressed betwsen said gasket and a nut on said threaded ro 5. The combination of a gas actuated speed control for internal combustion engines having a projecting operating rod and regulating spr-in a bell'crank lever, one extremity of w ich contacts with said sgring; a clam t e gear shift ever of an automobile and connecting means connecting said clamp to the other extremity of the bell crank lever. In testimony whereof I affix my si ature.

CHARLES EDWARD WISH RD.

adapted to be secured to 

